Rear axle spacers and effect on ride

[Richierich]

Hi all

Been messing around with various spacers on my Oval to get the rims (Gasburners) to sit where I want them. Running short axles so need to space some to get the tyres out a bit and also clear the adjustable spring plate steps with the tyre size. Effectively now, I'm running 5+3mm spacers either side (so 8mm total each side) and have noticed at around 55 mph on the freeway, the car has a shimmy/shake - almost like what you would get with wheels being way of of balance. Tyres are new and balanced correctly so what I was wondering if someone can answer is, can too much spacer OR effectively lengthening the axles have this effect? Seeing as it didn't do this before I added the 3mm spacers, I guess I may have the answer already but thought I would ask the opinions of those of you more knowledgeable than I.

Thanks in advance.

[eskamobob1]

are your spacers proper quality? Spacers can be out of balance as well, and using multiple sets of spacers over a single larger spacer make ti easier to mislign them slightly and have this happen as well.

[Richierich]

The 5mm ones are good quality - the 3.5mm ones maybe not so much. I think i will be trying some different configurations. Thanks for your response, i appreciate it.

[Lanner]

Are the wheels mounted lug centric or hub centric. That makes alot of difference. You didnt mention brake setup but if redrilled ghia disk/drum combo and its not 100% concentric to axle center this can be the result.